Lock-lever.



UNITED STATES Tatented July 21, 1903.

PATENT OFFIC MARSHALL N. KIRKHUFF, OF CANTON, ILLINOIS, ASSIGNOR TOPARLIN &

ORENDORFF COMPANY, OF CANTON, ILLINOIS, A CORPORATION ILLINOIS.

LOCK-LEVER.

SPECIFICATION forming part of Letters Patent No. 734,420, dated July 21,1903.

Application filed April 8I 1903. Serial No. 151 ,672- (No model.)

chanics; and the object is to provide means" for securely holding alever at various minute differences of position.

It is common practice to provide lock-levers with notched arcsconcentric with the fulcrums of the levers and to place slidable boltson the levers in position to engage the notches and hold the levers indifferent positions, but.

where the lever is used for heavy work the bolt must be large to bestrong, the spaces be-l' tween notches must be rather wide for the samereason, and delicate adjustment is out of the question. Ordinarily theteeth of the arc and the bolt of the lever may be made strong enoughwhile permitting the delicacy of adjustment required, but there arecases where this is impossible, and to such cases the present inventionis applicable.

In the drawing forming part of this specifif cation a lever constructedin accordance with my invention is shown in elevation.

The power end of the lever is shown at 1, and the weight or work endthereof at 1. The lever is fulcrumed at 2 in a suitable bearing, whichin this instance comprises a frame 7, and the arc-formed rack 8 isformed on frame 7 concentric with the fulcrum. A toothed wheel 10 is journaled on a pin or stud 9, which projects laterally from a face of thelever 1, and the teeth of wheel 10 are shaped to engage the notches ofthe rack 8. A larger wheel 11 is formed integral with or is rigidlysecured to the toothed wheel 10, and the wheel 11 is provided withnotches in its perimeter to receive the lock-bolt of the lever.

The construction of the lock-bolt of the lever is immaterial so far asthis invention is concerned, but in this instance it is shown in theusual form. A housing 3 is secured to the lever. The bolt 4 has slidingbearings in the housing and is pressed into engagement with the notchedwheel 11 by a spring. (Not shown.) A hand-lever 5 is pivotally connectedwith the power end of the lock-lever, and a link 6 connects thehand-lever with bolt 4. In this instance there are five teeth on wheel.10 and twelve notches in the larger wheel 11..

Consequently the lever is adjusted fivetwelfths of one of the notches ofracl; 8 whenever the wheel 11 is shifted a notch with reference to thelock-bolt 4. This proportion between the toothed wheel and the notchedwheel may be varied to give stillnicer adj ustment of the lever, ifdesired, and it will be readily seen that the strength of the lockingadjuncts of the lever is not impaired by providing for delicacy ofadjustment.

Theextension 1 is representative merely of the power end of the lever,and it is obvious that motion may be imparted from the lever to the workrequired of the lever in various ways. The lever may be of any desiredconstruction and of either of the three classes, and the bolt may beactuated and controlled in any well-known manner.

I claim- 1. In a lock-lever, the combination of a lever, a fulcrum forthe lever, an arc-formed rack concentric with the fulcrum of the lever,a toothed wheel journaled on the lever in mesh with the rack, a largernotched wheel concen ,trio with the toothed wheel and rigid therewith,and a bolt on the lever to engage the notches of the notched wheel.

' 2. In a lock-lever, the combinationof a lever, a fulcrum for thelever, an arc-formed rack concentric with the fulcrum of the lever, atoothed wheel journaledon'the lever in mesh with the rack, a largernotched Wheel integral and concentric with the toothed wheel,-a bolt onthe lever to engagethe notched wheel and a hand-lever on the main leverconnected with the bolt.

In testimony whereof I sign my name in the presence of two subscribingwitnesses.

MARSHALL N. KIRKHUFF.

* Witnesses:

G. F. PROE'ISLING,

ALICE 0. MILLER.

